Late period

Lorna
Hi guys l, so I have pretty irregular periods but never going over 39 days and it's been 45. I took a test today at 11dpo and it shows negative. I had some weird cramping 10 days ago the day after ovulation my stomache went all hard and manageable pain but never usually get that! I have sore boobs that have only just started but usually start before AF :/ keep thinking AF is coming but it doesn't:/ So is there any chance I just took the test too early and could still be pregnant?:/